摘要
A biphasic bone grafting biomaterial based on a mixture of calcium phosphates and beta-tricalcium phosphate (<em>β</em>-TCP) phases with high nanoporosity was synthesized. The synthesis route was based on calcium phosphate composition and the incorporation of glycolic acid as a pore former, giving a material composed of 97% <em>β</em>-TCP and 3% calcium orthophosphates (CaPO<sub>4</sub>). An<em> i</em><em></em><span></span><em>n </em><em>vitro</em> study of the purity, microstructure, crystalline domain, and pores size for the material obtained was performed by SEM analysis as well as full structural characterization. The region of interest related to the surface was determined by the specific surface area measured with the BET method. <em>In vivo</em> evaluation of bone response was performed by implanting the new low-cost biphasic manufacturing material synthesized in this work, which was compared with a biphasic material of similar chemical and microstructural composition existing in the commercial market and with higher cost called Synergy Odontit<sup><span style="white-space:nowrap;">®</span></sup> <em>β</em>-TCP. The materials were implanted separately into 5 mm diameter defects in the tibias of New Zealand White rabbits at 30, 60, and 90 days. The results obtained showed that the host tissue well accepted the new biphasic material;the presence of new bone formation was observed. A more complete resorption was observed for the new microcrystalline biphasic material compared to for a commercial <em>β</em>-TCP material.
A biphasic bone grafting biomaterial based on a mixture of calcium phosphates and beta-tricalcium phosphate (<em>β</em>-TCP) phases with high nanoporosity was synthesized. The synthesis route was based on calcium phosphate composition and the incorporation of glycolic acid as a pore former, giving a material composed of 97% <em>β</em>-TCP and 3% calcium orthophosphates (CaPO<sub>4</sub>). An<em> i</em><em></em><span></span><em>n </em><em>vitro</em> study of the purity, microstructure, crystalline domain, and pores size for the material obtained was performed by SEM analysis as well as full structural characterization. The region of interest related to the surface was determined by the specific surface area measured with the BET method. <em>In vivo</em> evaluation of bone response was performed by implanting the new low-cost biphasic manufacturing material synthesized in this work, which was compared with a biphasic material of similar chemical and microstructural composition existing in the commercial market and with higher cost called Synergy Odontit<sup><span style="white-space:nowrap;">®</span></sup> <em>β</em>-TCP. The materials were implanted separately into 5 mm diameter defects in the tibias of New Zealand White rabbits at 30, 60, and 90 days. The results obtained showed that the host tissue well accepted the new biphasic material;the presence of new bone formation was observed. A more complete resorption was observed for the new microcrystalline biphasic material compared to for a commercial <em>β</em>-TCP material.
作者
Miguel Ángel Garcés-Villalá
Sergio David Rico
Sergio Gustavo Nazar
Mariano Escudero-Pinel
Víctor Galván-Josa
José Luis Calvo-Guirado
Miguel Ángel Garcés-Villalá;Sergio David Rico;Sergio Gustavo Nazar;Mariano Escudero-Pinel;Víctor Galván-Josa;José Luis Calvo-Guirado(Department of Implant and Biomaterial Research, Fundación Corazón de Jesús, San Juan, Argentina;Facultad de Matemática Astronomía y Física, Universidad Nacional de Córdoba, Córdoba, Argentina;Department of Oral Surgery and Implant Dentistry, Faculty of Health Sciences, Universidad Católica San Antonio de Murcia, Murcia, Spain)
